English-5
COM2 Port [A Series]
MODE1 MODE2 MODE3
COM Port PIN
RS-232 RS-422 RS-485
1 RXD- D-
2 RXD RXD+ D+
3 TXD TXD+ D+
4 TXD- D-
5 GND
6 RTS-
7 RTS RTS+
8 CTS CTS+
9 CTS-
Note 1: Blank = No Connection.
Note 2: When selecting Mode3 (for RS-485), D+ indicates that PIN 2 and PIN 3 is connected, and D-
indicates that PIN 1 and PIN 4 is connected.
COM2 and COM3 Port [AE, A80THTD1 and A10THTD1 Series]
MODE1 MODE2 MODE3 MODE4 MODE5 MODE6
COM Port PIN
RS-232 RS-422 RS-485 RS-232*2 RS-422*2 RS-485*2
1 RXD- D- RXD1- D1-
2 RXD RXD+ D+ RXD1 RXD1+ D1+
3 TXD TXD+ D+ TXD1 TXD1+ D1+
COM2
4 TXD- D- TXD1- D1-
5 GND
6 RTS- TXD2- D2-
7 RTS RTS+ TXD2 TXD2+ D2+
8 CTS CTS+ RXD2 RXD2+ D2+
COM3
9 CTS- RXD2- D2-
Note 1: Blank = No Connection.
Note 2: When selecting Mode3 (for RS-485), D+ indicates that PIN 2 and PIN 3 is connected, and D-
indicates that PIN 1 and PIN 4 is connected. When selecting Mode6 (for RS-485), D1+
indicates that PIN 2 and PIN 3 is connected, D1- indicates that PIN 1 and PIN 4 is connected,
D2+ indicates that PIN 7 and PIN 8 is connected, and D2- indicates that PIN 6 and PIN 9 is
connected.
COM1 and COM3 [AS38BSTD Series]
MODE1 MODE2
COM Port PIN
RS-232 RS-232*2
1
2 RXD RXD1
3 TXD TXD1
COM1
4
5 GND
6
7 RTS TXD2
8 CTS RXD2
COM3
9
Note: Blank = No Connection.
Pin
Pin
Pin
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